(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Some particle accelerators allow protons (p+) and antiprotons (p-) to circulate at equal speeds in opposite directions in a device called a storage ring. The particle beams cross each other at various points to cause p+ + p- collisions. In one collision, the outcome is p+ + p- yields e+ + e- + γ + γ, where γ represents a high energy gamma-ray photon. The electron and position are ejected from the collision at 0.9999995c and the gamma-ray photon wavelengths are found to be 1.0 X 10-6 nm. What were the proton and antiproton speeds prior to the collision?

m(e-)=9.11e-31(kg), λ(γ)=1e-6(nm)

2. Relevant equations

Ei = Ef

E=mc^2 - 0.5mu^2

E=γmc^2

3. The attempt at a solution

I have no ideas how to start and where to start in this question. Please help.

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# Homework Help: How to find the velocity of the protons and antiprotons?

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